Bob and Srwooten, you are both correct about modern Edge amps shutting of the output as soon as the power switch is turned off-- perhaps these have a speaker-wire relay which disengages.
Srwooten, the power-LED may indeed discharge the power supply, but on our current NL-amp, if we do not wait at least 20 seconds (while still playing music) before turning it back on, OMG what a thump occurs into the speakers! So we wait... probably a good idea for any amp even if one hears the speakers go off instantly.
Bob, I don't know much about our amp other than it was a custom unit (in one chassis) made for us by Tom at Edge before he sold the company. I do know it's 350W/channel into 8 Ohms, and rather heavy.
Best regards,
Roy